jones



(No Model.) 2 Sheets-Sheet 1.

R. P. JONES.

4 ELECTRIC ARC LAMP. No. 355,172. Patented Dec. 28, 1886.

I Zaarcl I 678/26 @M 5,9 axiom 121 N PETERS, Plmtb-Lfllvugmpher. Washin mn. UJC.

(No Model.) 2 Sheets-Sheet 2.

R. F. JONES.

ELEGTRIU ARC LAMP.

No. 355,172. Patented Dec. 28, 1886.

N. PETERS, Phc-to-Liflmgniphm', Washington. D. c.

UNITED STATES PATENT OFFICE.

RICHARD F. JONES, OF ST. LOUIS, MISSOURI.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 355,172, dated December 28, 1886.

Application filed August '7, 1886. Serial No. 210,334. (No modcLl T0 aZZ whom it may concern:

Be it known that l, RICHARD F. JONES, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Electric-Arc Lamps, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which Figure 1 is an elevation of my improved lamp. Fig. 2 is an elevation of the lamp, showing another side from that shown in Fig. 1. Fig. 3 is a horizontal transverse section taken on, line 3 3, Fig. 2, looking downward. Fig. 1 is a similar view looking upward. Fig. 5 is an enlarged detail vertical section taken on line 5 5, Fig. 2. Fig. 6 is a horizontal transverse section taken on line 6 6, Fig. 1. Fig. 7 is an enlarged horizontal detail section taken on line 7 7, Fig. 1. Fig. 8 is avertical section taken on line 8 8, Fig. 7.

The present invention relates to improvements on Letters Patent granted to myself September 15, 1885, No. 326,123; and the principal object of my present invention is to provide a means for holding and feeding the respective carbons, and a means, so far as the upper carbon is concerned, that will give a constant bearing upon. the carbon and avoid an objection to my former patent of a space being left at times when the carbon feeds between the carbon and the clamps or levers; and, so far as the lower carbon is concerned, my present invention relates to a mechanism which will insure a uniform pressure upon the carbon regardless of irregularities in its size or diameter.

My present invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Referring to the drawings, A represents the frame of the lamp.

B represents the upper carbon, and B the lower carbon.

0 represents a tube through which the up per carbon is fed and in which it is held, and 0 represents atube through which the lower carbon is fed and in which it is held. Surrounding the tube 0 is a sleeve, D, provided with arms D, similar to those in my former patent already referred to, and, as in my formerpatent, there is pivoted to the lower ends of these arms levers E, provided with counterbalances or weights E. In my former patent the inner ends of theselevers were constructed to bear directly against the carbon. The effect of this was that when they were acted upon by the magnets to release the carbon there would be a space left between the carbon and each lever, which resulted in the electric current arcing across from the lever to the the carbon, which was found objectionable, in that the carbon and ends of the levers would be burned. To avoid this I have pivoted to the arm D a clasp, F, which is made in two parts, as shown, each part being pivoted to one of the arms 1), as shown in Fig. 1. Each part is made /-shaped on its inner surface to form a bearing for the carbon, and the two parts form substantially a divided sleeve with a space left between them. bly pivoted to the arms D by links F, so as to allow them to spring outward freely when the levers Eare operated and permitthe downward feed of the carbon. It will thus be seen that with this arrangement there will always be a contact between the carbon and the clasp F, for at no time is the clasp swung out sufficiently far to be removed out of contact with the carbon, but only suiiiciently to'allow the carbon to slip through.

G represents the vertical rods, which are pivoted at their lower ends to lever B, and pass through an opening in plate H, and are attached to bar G.

I have shown in this application two helices having movable armatures 'or cores I, arranged vertically and secured to the top of the frame A.

The plates H are connected to the cores in They are preferathis instance by a plate, H and a bar, J, the

plates H, which grip the rods G by their free ends hanging down and not being lifted with their short ends, the two members H and G thus binding upon each other. The lifting of rods G causes the inner ends of levers E to compress the clasp E, which in turn grips the carbon, thus'raising said carbon to form the are, the sleeve D sliding on the tube 0. When the core or armature falls, the set-screws Z in the free ends of plates II come against the cross piece Aof the lamp and prevent the free ends of the plates H from moving downward, which at one releases the rods G, and their weight causes the levers E to allow the clasp F to loosen its grip on the carbomwhich then feeds downward, and as soon as the core rises the clasp is caused to grip the carbon again, holding it from moving too far, and thus a constant feed is kept up. It will now be understood how the rise and fall of the cores will operate the levers E and through means of the clamp F control the feed of the carbon.

The lower carbon is supported in its tube from beneath in the same manner as in my patent referred tothat is to say, by means of a plate, L, connected to counter-weights L by ropes or cords L passing over pulleys If, one of which should be made of some non-conducting material, to prevent the passage of the electric current from one side of the lamp to the other; or, instead of one of these pulleys being made of non-conducting material, other means could be provided to insulate one side of the lamp from the other.

The part of my present invention relating to the means operating upon the lower carbon consists of a dog, M, in the form of alever, pivoted at M to a projection, M", extending outward from a collar, M formed upon or secured to the tube 0. The inner end of this dog bears against the carbon and holds it from upward movement under the influence of the weights L until it is released by the descent of the cores. The dog is held into contact with the carbon by means of a spring, N, secured to the projection Mfland bearing against the outer end of the dog.

It will be seen that when any irregularities in the carbon come opposite the dog the latter will be constantly held against the carbon by the spring. To insure a uniform action of the dog on the carbon each time the cores descend, I have provided the following means:

0 represents a yoke, between which the outer part of the dog M fits, and the inner ends of which have inclined notches 0, receiving the pin M,that connects the dog M to the projection DP. The outer end of this yoke has a ratchet-tooth, 0 that engages the teeth of a rack, M, on the outer end of the dog M. Sccured to the outer end of the yoke is a rod,I, that extends upward and is connected to a bar, I pivoted at I to the frame of the lamp, andjamming at its inner end by means of a red, I against the plate H". The red I has jam-nuts I on its upper end, which are held against the plate iH by a spring, I. Now, when the plate H and cores fall, it will be seen that the outer end of the yoke 0 will be depressed, and as it is depressed the inner end of the dog M will be released from the carbon.

In order that the action of the yoke upon the dog will always be the same regardless of the position of the dog before mentioned,cansed by irregularities in the carbon, the yoke is so constructed that when the spring N lifts the dog'it will move outward, allowing the teeth 0'' to be disengaged from the notch it occupies, and this movement of the yoke is provided for by means of the inclined notches O in the inner end of the yoke, that fit over the pin 3 Thus, when the yoke is lifted, a ver tieal movement of it will take place, (owing to the inclined notch bearing on the pin,) and the tooth will thus be made to engage the rack at the same horizontal point when the yoke again descends.

To assist the cores in supporting the collar D, arms D, and parts attached thereto, I locate springs U between the base-plate of the frame and nuts on the upper ends of rods IV, as shown in Fig. 2[ The rods XV extend upward from the arms D through the base-plate of the frame, and the springsU preferably surround these rods, as shown.

It has been found at times that an electric current would arc across from the upper tube of the lamp to the carbon. To avoid this difficulty I have placed insulations Y between the frame and the tube, as shown in Fig. 2.

I claim as my invention 1. In an electric-arc lamp, the combination of the lovers for grasping the upper carbon, a clasp located between the inner ends of the levers and the carbon, rods connected to and extending upward from the lovers, and means for operating said levers electrically, substantially as set forth.

2. In an electric-arc lamp, the combination of the pivoted clasp, levers for engaging the clasp and pressing it against the carbon, and means for operating the levers, substantially as and for the purpose set forth.

3. In an electricarc lamp, the combination of the pivoted two-part clasp, levers bearing, respeeti vel y, against the two parts of the clasp, and means for operating the levers, substantially as set forth.

4. In an electric-arc lamp, the combination of the tube for receiving the upper carbon, arms secured to the tube, clasp pivoted to the arms and bearing against the clasp, and means for operating the levers, substantially as set forth.

5. In an electric-arc lamp, in combination with the tube for receiving the carbon, arms connected to the tube, levers connected to the arms, clasp connected to the arms, rods extending upward from the arms and levers, plate connected to theupper ends of the arms, rods, springs located around the rods, and means for operating the plate electrically, substantially as set forth.

6. In an electricarc lamp, in combination with the tube for holding the upper carbon, arms connected to the lower end of the tube, clamp connected to the arms, levers connected to the arms, rods connected to the levers, and spring-plate connected to the arms, rods, and means for operating the plate electrically, substantially as set forth.

7. In an electric-arc lamp, the combination of the pivoted clasp, levers for engaging the clasp and pressing it against the carbon, and means for operating the levers, the inner surface of the clasp being formed of shape, substantially as and for the purpose set forth.

8. In an electric-arc lamp, the combination of the tube forholding thelower carbon, springdog pivoted to the tube, yoke embracing the dog and having ratchet connection therewith, and means for operating the yoke electrically, substantially as set forth.

9. In an electric-arc lamp, the combination of the tube for holding the lower carbon, springdog pivoted to the tube, yoke having inclined notches at its inner end fitting over asecuring pin, rack on the outer end of the dog, ratchet- 2 5 tooth on the yoke, engaging the rack on the dog, and means for operating the yoke electricall y, substantially as set forth.

RICHARD F. JONES.

In presence of- GEO. H. KNIGHT, Jon. WAHLE. 

